AC motor spindle

AC motor is a very general classification, the type of motor itself is very large, AC motor itself can also be divided into low speed with high speed, low speed can be called low speed motor, low speed motor, high speed can be called high speed motor, high speed motor, Motor, and high-speed motor can be called electric spindle, high-speed spindle and so on.

What is the electric spindle

Electric spindle is the last few years in the field of CNC machine tools will be the spindle and spindle motor integration of new technology, and linear motor technology, high-speed tool technology together, will be high-speed processing to a new era. The spindle is a set of components, which includes the motor spindle itself and its accessories: electric spindle, high frequency frequency conversion device, oil mist lubricator, cooling device, built-in encoder, tool changer.

Electric spindle technology:

High-speed bearing technology: electric spindle is usually made of composite ceramic bearings, wear-resistant heat, life is several times the traditional bearing; sometimes using electromagnetic bearings or hydrostatic bearings, inner and outer ring does not touch, theoretically life-

High-speed motor technology: electric spindle is the product of the motor and the spindle fused together, the rotor of the motor is the rotating part of the spindle, theoretically the spindle can be regarded as a high-speed motor. The key technology is the dynamic balance at high speed;

Lubrication: the lubrication of the spindle is generally used to regularly lubricate oil and gas; can also be used grease lubrication, but the corresponding speed to be discounted. The so-called timing, that is, every time interval interval note oil. The so-called quantitative, that is, by a device called quantitative valve, the precise control of each oil oil. The oil and gas lubrication, refers to the lubricating oil in the compressed air carrying, was blown into the ceramic bearings. Oil control is very important, too little, not the role of lubrication; too much, high-speed rotation in the bearing when the resistance due to oil and heat. Cooling device: In order to heat the high-speed operation of the spindle as soon as possible, usually on the outer wall of the spindle through the circulating coolant, the role of the cooling device is to maintain the temperature of the coolant.

Built-in pulse encoder: In order to achieve automatic tool change and rigid tapping, spindle built-in a pulse encoder to achieve accurate phase angle control and with the feed.

Automatic tool changer: In order to apply to the machining center, the spindle is equipped with automatic tool changer, including disc spring, broach cylinder;

High-speed tool loading card way: widely familiar with the BT, ISO tool, has been proved not suitable for high-speed processing. In this case there are HSK, SKI and other high-speed tools.

High-frequency frequency conversion device: To achieve the electric spindle tens of thousands or even tens of thousands of revolutions per minute speed, must use a high-frequency inverter device to drive the spindle built-in high-speed motor, the inverter output frequency must reach thousands or thousands of Hz